Pre owned, Fully Cleaned!! In VERY GOOD CONDITION!! VERY FLEXIBLE! NOT DRYED OUT!! See photos for details. The Hydro Tech Surf Bodyboard Fins by Hydro Fins are designed for bodysurfing enthusiasts. These black fins, measuring 9-10 inches, are a high-quality option for those looking to enhance their surfing experience. With a focus on durability and performance, these Hydro Tech Fins are sure to help improve your bodyboarding skills in the surf.